From 0d37c2671425c5a106a75f6c379e3190d8b0b019 Mon Sep 17 00:00:00 2001
From: drug007 <drug2004@bk.ru>
Date: Sun, 9 Jan 2022 17:45:36 +0300
Subject: [PATCH 1/2] Close #34 `sdl example not building by ldc2`

Work around ldc2 issue
---
 auxil/source/auxil/model.d | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/auxil/source/auxil/model.d b/auxil/source/auxil/model.d
index 00d784cd..b3f40ade 100644
--- a/auxil/source/auxil/model.d
+++ b/auxil/source/auxil/model.d
@@ -955,7 +955,7 @@ mixin template visitImpl()
 
 			static if (hasTreePath) visitor.tree_path.put(0);
 			static if (hasTreePath) scope(exit) visitor.tree_path.popBack;
-			const len = getLength!(Data, data);
+			auto len = getLength!(Data, data);
 			static if (is(typeof(model.length)))
 				assert(len == model.length);
 			if (!len)
@@ -1000,14 +1000,17 @@ mixin template visitImpl()
 			else static if (dataHasAggregateModel!Data)
 			{
 				scope(exit) dbgPrint!(hasSize, hasTreePath)("scope(exit) this.size: ", this.size);
+				// work around ldc2 issue
+				// expression `const len = getLength!(Data, data);` is not a constant
+				const len2 = DrawableMembers!Data.length;
 				switch(start_value)
 				{
-					static foreach(i; 0..len)
+					static foreach(i; 0..len2)
 					{
 						// reverse fields order if Order.Bubbling
-						case (Sinking) ? i : len - i - 1:
+						case (Sinking) ? i : len2 - i - 1:
 						{
-							enum FieldNo = (Sinking) ? i : len - i - 1;
+							enum FieldNo = (Sinking) ? i : len2 - i - 1;
 							enum member = DrawableMembers!Data[FieldNo];
 							static if (hasTreePath) visitor.tree_path.back = cast(int) FieldNo;
 							static if (hasSize) scope(exit) this.size += mixin("this." ~ member).size;
@@ -1022,9 +1025,9 @@ mixin template visitImpl()
 						goto case;
 					}
 					// the dummy case needed because every `goto case` should be followed by a case clause
-					case len:
+					case len2:
 						// flow cannot get here directly
-						if (start_value == len)
+						if (start_value == len2)
 							assert(0);
 					break;
 					default:

From dafdf7aaa2cbe7adfe49bef69c9425d62ede9a6c Mon Sep 17 00:00:00 2001
From: drug007 <drug2004@bk.ru>
Date: Sun, 9 Jan 2022 17:51:46 +0300
Subject: [PATCH 2/2] Enable ldc2 in github actions

---
 .github/workflows/main.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 42cf3097..5318eb4f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
       matrix:
         # Latest stable version, update at will
         os: [ ubuntu-18.04, windows-2019 ]
-        dc: [ dmd-latest, dmd-master ]
+        dc: [ dmd-latest, dmd-master, ldc-master, ldc-latest ]
 
     runs-on: ${{ matrix.os }}
     steps: